In Seven Knights Re:BIRTH, Ruby is one of the most valuable currencies for your account progression. To maximize your account growth, prioritize spending Ruby on keys first (50-80 Ruby bundles from the Exchange Shop), then summons while maintaining a 3,000-4,000 Ruby reserve, and avoid unnecessary purchases like overpriced tickets or arena keys. This strategic approach ensures steady progression whether you're F2P or a light spender.
| Priority | Item | Ruby Cost | Why It's Essential |
|---|---|---|---|
| #1 | Key Bundle (Free) | 0 Ruby | Daily free bundle - never miss this |
| #2 | Key Bundle (Package A) | 50 Ruby x20 | Most cost-efficient, always profitable |
| #3 | Key Bundle (80 Ruby) | 80 Ruby x50 | Still profitable, excellent value |
| Optional | Key Bundle (100 Ruby) | 100 Ruby | Only if you need extra keys |
| #4 | Hero Summons | Variable | After securing keys, build your roster |
| Reserve | Emergency Fund | 3,000-4,000 | Always maintain this buffer |
Ruby serves as the lifeblood of your Seven Knights Re:BIRTH account, fueling everything from hero development to resource generation. Unlike many gacha games where premium currency is purely for summoning, Ruby in Re:BIRTH creates a self-sustaining economy when spent wisely. They're used for summoning heroes, upgrading gear, buying resources, and even unlocking extra farming potential.
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The game's unique Ruby farming system allows you to generate 20 Ruby for every fodder hero leveled from 1 to 30, creating a renewable income source. However, this system only works efficiently when you invest Ruby back into keys, which enable more farming runs. This creates a positive feedback loop: more keys lead to more fodder leveling, which generates more Ruby, allowing you to buy even more keys.
Keys are essential for progression since they let you enter Adventure stages. Every Adventure run costs 6 keys, and these runs are where you level fodder heroes, collect gold, and gather materials. Without keys, your entire progression grinds to a halt, making them the single most important Ruby investment.
The mathematics behind key investment are compelling. By spending 250 Rubies on Key Bundles in the Shop, you can earn approximately 300 Rubies after 50 Repeat Battles when farming Region 11-1. Essentially, this nets you a profit 50 Rubies in addition to Gold, fodder heroes, and other drops. This positive return on investment makes key purchases self-sustaining.
The Exchange Shop offers multiple key bundle tiers, and understanding which to purchase is crucial for maximizing your Ruby efficiency:
Daily Free Bundle: Every day, you get 1 free key bundle. This should be your first stop every reset. Missing this free bundle is equivalent to throwing away Ruby, as it costs you nothing and provides immediate value.
Package A (50 Ruby Bundles): After that, buy the bundles priced at 50 Ruby each—these are the most cost-efficient. With 20 bundles available daily at this price point, you'll spend 1,000 Ruby for 1,200 keys. This exchange rate almost guarantees profit when farming in appropriate areas.
Package B (80 Ruby Bundles): Once the 50 Ruby bundles are gone, bundles priced at 80 Ruby each are still worth buying since the return is higher than the investment. These 50 bundles cost 4,000 Ruby total for 3,000 keys. While the exchange rate is less favorable than Package A, you'll still generate profit in efficient farming areas.
100+ Ruby Bundles: Higher-priced bundles (100 Ruby) can be considered optional, depending on your playstyle and needs. Most players should avoid these unless they're pushing for specific goals or have excess Ruby reserves.
Your farming location dramatically affects key bundle profitability. For F2P players, Package B is risky early on (especially before Area 14) because you'll often lose rubies on the trade. This makes area progression essential before committing to expensive key bundles.
Key efficiency milestones occur at:
Until you reach Area 14, stick primarily to Package A bundles. The improved experience rates in higher areas mean fodder heroes level faster, requiring fewer runs and therefore fewer keys to generate the same Ruby return.
After securing your daily key supply, summoning becomes your next Ruby priority. However, this doesn't mean spending everything on banners. Don't go all-in—always save at least 3,000–4,000 Ruby as a safety net. This reserve ensures you can always buy keys tomorrow, preventing your progression from stalling.
Summoning not only helps you get powerful heroes but also provides more fodder for Ruby farming. Every summoned hero, regardless of rarity, can be leveled to 30 for Ruby generation. This dual benefit makes summoning a valuable investment when done strategically.
Not all summon banners offer equal value. Prioritize your Ruby spending on:
Avoid spending on standard banners unless you're close to pity or have specific needs. The lower rates and lack of guarantees make them poor Ruby investments compared to special events.
The 3,000-4,000 Ruby safety net isn't arbitrary. This amount ensures you can:
Think of this reserve as your account's health insurance. Dipping below this threshold risks stalling your progression entirely if you can't afford keys tomorrow.
Arena Keys (10 Ruby each): Optional, since Arena keys regenerate fast. While PvP provides honor points and weekly Ruby rewards, the rapid key regeneration makes purchasing extra keys unnecessary for most players. Only consider these if you're pushing for specific rank rewards or competing seriously.
Event Tickets or Shop Items: Only buy if you really need them; most aren't worth spending Ruby on compared to keys and summons. Event tickets might seem appealing, but calculate the expected return before purchasing. Unless an event offers exceptional rewards or limited-time exclusives, your Ruby generates better returns through the key-farming cycle.
Occasionally, the shop features limited-time Ruby deals or packages. Evaluate these based on:
Most special deals fail to match the consistent value of key investments, making them poor choices for F2P and light spenders focused on progression.
Don't spend all Ruby on summons. Keep reserves for future banners. New players often exhaust their Ruby chasing specific heroes, leaving nothing for keys. This creates a progression wall where you can't farm, can't level heroes, and can't generate more Ruby. Always prioritize sustainable growth over gambling.
Don't buy unnecessary tickets from the shop. Save Ruby for progression essentials. The shop contains numerous Ruby sinks that provide minimal value. Items like stamina potions, low-tier enhancement materials, or overpriced fodder heroes waste Ruby that could generate better returns through key purchases.
Don't sacrifice fodder heroes under level 30. Level them up first for maximum Ruby gain. Every hero can generate 20 Ruby when leveled to 30. Using them as enhancement materials before reaching this milestone literally throws away Ruby. Patience in fodder management translates directly to Ruby wealth.
Missing daily free key bundles, guild check-ins, or mission rewards creates Ruby deficits that compound over time. These free resources might seem minor individually, but collectively represent thousands of Ruby monthly. Establish a daily routine to claim everything available.
Every time you level a hero from level 1 to 30, you're rewarded with 20 rubies, which must be manually claimed from the Missions Tab. This simple mechanic forms the foundation of Ruby generation in Seven Knights Re:BIRTH.
The complete Ruby farming cycle works as follows:
Your daily Ruby generation depends heavily on whether you're F2P or a light spender:
F2P Players: The maximum theoretical ruby profit from free keys alone is about 880 rubies per day
Light Spenders: Light spenders can push up to 1,440 rubies per day
To optimize your Ruby generation:
Free-to-play accounts require stricter Ruby discipline:
If you're F2P, don't stress too much—just focus on efficiency and steady progression. Your growth will be slower but still substantial with proper Ruby management.
Small investments dramatically improve Ruby efficiency:
That extra regen plus 10% EXP boost makes a huge difference. Even minimal spending transforms your Ruby economy, making Package B bundles profitable earlier and accelerating overall progression.
During special events, temporary stages often provide fixed experience amounts that can be more efficient than regular Adventure farming. These stages typically grant 1,250 experience per run, allowing heroes to reach level 30 in exactly 10 runs. However, they don't drop fodder heroes, requiring careful inventory management.
Once unlocked, Nightmare stages revolutionize Ruby farming. Each run costs 12 keys but counts as two rounds, letting you level 8 fodder simultaneously across two teams. Nightmare Stages: Higher difficulty = Better rewards and faster progression
The increased gold, better equipment drops, and superior fodder efficiency make Nightmare farming the endgame Ruby generation method. Push toward Nightmare accessibility as a primary account goal.
Active guild participation provides substantial Ruby benefits:
Participating in check-ins, guild missions, and guild shop exchanges will give a steady trickle of additional currency. Choose guilds with high participation rates to maximize these benefits.
Establish clear Ruby spending goals aligned with account development:
Early Game (Areas 1-7):
Mid Game (Areas 8-13):
Late Game (Area 14+):
Endgame (Nightmare Farming):
Seven Knights Re:BIRTH regularly introduces new content requiring Ruby investment. Anticipate these releases by:
Major updates often feature:
Stay informed about Ruby-related events and updates through:
Several community tools help optimize Ruby spending:
These resources, maintained by dedicated players, provide data-driven insights for Ruby optimization beyond basic strategies.
Once you reach Area 14 (and farming becomes more efficient), consider Package B if you've got a comfortable ruby cushion. Before Area 14, the Ruby-to-key conversion often results in losses, making Package A the safer choice for steady progression.
Maintain your 3,000-4,000 Ruby reserve, then save additional amounts based on banner costs. Step-up banners typically require 5,000-10,000 Ruby for completion, while reaching pity on standard banners might need 20,000+. Plan accordingly based on upcoming releases.
Only in specific situations. Arena keys regenerate quickly enough for casual participation. Consider Ruby purchases only when pushing for season-end rewards or during special Arena events with exceptional prizes.
Area 14-1: Offers the highest efficiency for Ruby farming. This stage provides optimal experience-per-key ratios while maintaining consistent clear rates. Earlier players should farm the highest area they can reliably auto-battle.
Yes, particularly in early areas. For F2P players, Package B is risky early on (especially before Area 14) because you'll often lose rubies on the trade. Calculate your specific farming efficiency before committing to expensive bundles.
Generally no. Equipment enhancement materials come from dungeons and events without Ruby investment. Save Ruby for keys and summons unless facing specific progression walls requiring immediate gear improvements.
Dramatically. The faster key regeneration and experience bonuses from subscriptions can nearly double daily Ruby generation. Even F2P-focused players should consider the Daily Ruby Support as a one-time investment for long-term returns.
Without Ruby for keys, progression halts entirely. You'll rely on natural key regeneration (480 daily for F2P), dramatically slowing advancement. This situation, called "Ruby bankruptcy," is why maintaining reserves is critical. Recovery requires patience and disciplined spending to rebuild.
Success in Seven Knights Re:BIRTH hinges on intelligent Ruby management rather than lucky summons or massive spending. By prioritizing keys, maintaining reserves, and avoiding common pitfalls, even F2P players can achieve steady progression and competitive teams.
Remember these core principles:
With the right management, Ruby will become the backbone of your account growth. Whether you're starting fresh or optimizing an existing account, these strategies ensure your Ruby works harder, stretches further, and generates consistent returns.
Start implementing these strategies today. Claim your free daily bundle, evaluate your current Ruby allocation, and begin building toward sustainable progression. The path from novice to veteran isn't measured in luck—it's paved with smart Ruby decisions made consistently over time.
For the latest updates, codes, and community strategies, bookmark this guide and join the official Discord. Your Seven Knights Re:BIRTH journey starts with understanding Ruby, but mastery comes from applying these principles daily. Now get out there and start building your legendary roster—one Ruby at a time!